/// <summary>
/// login window uses this method to authenticate user
/// </summary>
/// <param name="username">username supplied by user</param>
/// <param name="password">password supplied by user</param>
/// <returns>
/// if authentication is successful, Candidate or Admin object is returned according to user type,
/// otherwise null
/// </returns>
public static User authenticateUser(String username, String password)
{
//get user
CTVIATBankDataSet.UsersDataTable table = usersAdapter.GetUserByUserNameAndPassword(username, password);
//if no user with supplied credentials, return null
if (table.Rows.Count == 0)
{
return(null);
}
//otherwise create user object
else
{
DataRow row = table.Rows[0];
if (Convert.ToByte(row["userType"]) == 1)
{
return(new Admin(Convert.ToInt32(row["userID"]), Convert.ToString(row["userName"]),
Convert.ToString(row["userPassword"])));
}
else
{
return(new Candidate(Convert.ToInt32(row["userID"]), Convert.ToString(row["userName"]),
Convert.ToString(row["userPassword"])));
}
}
}
